Ring traveler



May 22, 1962 S. KAUFMANN RING TRAVELER Filed Feb. 15, 1960 IN V EN TOR.

ATTOPNEY.

3,035,401 RING TRAVELER Siegfried Kaufmann, Winterthur, Switzerland, assignor to Actiengesellschaft Joh. Jacob Rieter & Cie, Winterthur,

Switzerland, a corporation of Switzerland Filed Feb. 15, 1960, Ser. No. 8,749 Claims priority, application Switzerland Jan. 8, 1960 2 Claims. (Cl. 57-125) The present invention relates to a traveler as used in ring spinning and ring doubling frames.

In ring spinning machines bobbins with hairy yarn are not infrequent, the hairs projecting from the yarn and collecting lint, forming beards and causing entanglements. Unless such beards and fiy accumulations are removed prior to weaving, they considerably spoil the appearance of the fabric. Removal of these irregularities necessitates an additional operation and is expensive. Hairy bobbins cause periodic inhomogeneties in the fabric because, during unwinding, the beards and entanglements appear predominantly in the outer layers and decrease considerably or disappear completely in the inner layers.

According to the invention, formation of the aforedescrihed irregularities are avoided by using a ring traveler for spinning, having surfaces which are placed at an angle and which are in contact with the spinning material, whereby a sharp edge, on which the yarn is diverted, is formed by the intersecting surfaces. It has been found that the radius of the curvature of the edge should not be more than 0.05 mm. to produce the desired result. The edge may be much sharper, the minimum radius being determined by the type of spinning material. The radius of the edge must be at least so great, i.e., the edge must be so round that the yarn is not damaged when passing the edge. When using a traveler provided with sharp thread-diverting edges according to the invention, the produced yarn is smooth and not hairy. The number of breakages of the thread or yarn, however, is not increased beyond the number of breakages occurring when using conventional ring travelers.

The novel features which are considered characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, and additional objects and advantages thereof will best be understood from the following description of embodiments thereof when read in connection with the accompanying drawing, in which:

FIG. 1 is a diagrammatic perspective illustration of a ring traveler running on a spinning ring, the cross section of which is shown. The figure also shows a thread portion passing through the traveler.

' atent FIG. 2 is an enlarged cross sectional view of a traveler according to the invention.

FIG. 3 shows a modification of the cross sectional configuration of a ring traveler according to the invention.

Referring more particularly to the drawing, numeral 1 designates a spinning ring on which travels a traveler 2. The traveler is held in equilibrium position by the pull of a thread or yarn 3, the centrifugal force, and the reaction of the support of the traveler on the spinning ring 1.

As seen in FIG. 2, the traveler has a rectangular cross section formed by outer surfaces 4, 5, 6 and an inner surface 7 pairwise intersecting at an angle (1 The intersection of the surfaces 4 and 7 and the intersection of the surfaces 6 and 7 form thread-diverting edges 8 and 9, respectively, which are sharp, i.e., very little rounded. The rounding radius r of the edges 8 and 9 is not greater than 0.05 mm.

In the embodiment of the invention shown in FIG. 3, the thread-diverting edges 10 and 11, corresponding to the edges 8 and 9 in FIG. 2, are formed by surfaces which intersect at an acute angle, i.e., at an angle a which is smaller than 90. The rounding radius r of the edges 10 and 11 is smaller than mm., also in this modification.

I claim:

1. A ring traveler for guiding a yarn to a bobbin having an inner surface which is substantially even in the travel direction of the traveler, and converging outer surface portions intersecting said inner surface and forming an acute angle with said inner surface, said intersecting surface and surface portions forming sharp edges for diverting the yarn and smoothing the surface thereof.

2. A ring traveler for guiding a yarn to a bobbin having an inner surface which is substantially even in the travel direction of the traveler, and outer surface portions intersecting said inner surface and forming an angle of not more than 90 with said inner surface, said intersecting surface and surface portions forming sharp edges at the intersection engaging the yarn for diverting the yarn and smoothing the surface thereof, said edges having a curvature whose radius is not greater than 0 .05 mm.

References Cited in the file of this patent UNITED STATES PATENTS 1,666,714 Merrill Apr. 17, 1928 1,728,540 Gilligan Sept. 17, 1929 2,111,545 Bassett Mar. 22, 1938 2,268,773 Peterson Jan. 6, 1942 2,925,641 Evans Feb. 23, 1960 

